248 FARM ARITHMETIC. 



32. A neighbor has 25 cows. Ten of them yield 40 

 pounds each, daily; another ten, 32 pounds; the other 

 five, 20 pounds a day. The fat test of the first group is 

 3.8 per cent, of the second group 4.5 per cent, and of the 

 third group 5.2 per cent. What quantity of fat is daily 

 produced by this herd ? 



33. Suppose the fat test of the first group to be 5.2 

 per cent and of the third group 3.8 per cent, the second 

 group remaining just the same. What quantity of fat 

 would be produced daily ? 



34. In a can is a certain quantity of milk that tests 

 4.8 per cent; in another can is a certain quantity that 

 tests 2.8 per cent. The amount of butter fat in both cans 

 is 40 pounds, one-fourth of which is in the first can. How 

 much milk in each can ? 



35. In the herd on this farm there is one cow that 

 yields 12,000 pounds of milk that tests 3.2 per cent butter 

 fat. How does her butter fat production compare with 

 another cow that yields 9,400 pounds of milk that tests 

 5.8 per cent butter fat? At 40 cents per pound for butter 

 how much in dollars does this difference amount to ? 



36. Compare the amount of plant food — nitrogen, 

 phosphoric acid, and potash — removed in 400 bushels of 

 wheat and in 400 bushels of potatoes. 



37. With nitrogen worth 20 cents, phosphoric acid 

 5 cents, and potash 5 cents, what is the plant food worth 

 that is removed in the wheat? In the potatoes? 



38. How many tons of silage should be stored for 

 the use of 10 cows, the intention being to feed each cow 

 40 pounds a day for 5 months, then 30 pounds a day for 

 2 months, then 20 pounds a day for 2 months? 



